Updated 4.2.4 Header Editor (markdown)

4.2.4-Header-Editor.md

@@ -19,7 +19,7 @@ Execute type: Custom function
 
 Code:
 ```js
-for (let a in val) {
+for (const a in val) {
     if (val[a].name.toLowerCase() === 'etag') { val[a].value = ''; }
 }
 ```